The E500 Residential Combustion Efficiency Analyzer is an entry-level, economical, and easy to use combustion gas analyzer for residential HVAC installation & maintenance. Measures O2, CO, CO2 (Calculates Combustion Efficiency, Excess Air, Losses, CO Air Free). Includes Draft Meter (Negative & Positive Draft), Cracked Heat Exchanger Test, Built–In Differential Digital Pressure Manometer, and Built–in Differential Thermometer.
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